MX2010007793A

MX2010007793A - Support for a piano lid.

Info

Publication number: MX2010007793A
Application number: MX2010007793A
Authority: MX
Inventors: Daniel E Geoghegan
Original assignee: Daniel E Geoghegan
Priority date: 2008-01-15
Filing date: 2009-01-13
Publication date: 2010-12-21
Also published as: JP5318889B2; EP2232477A4; HK1148599A1; US20090277317A1; JP2011522278A; US7999163B2; WO2009091742A9; CA2712042A1; WO2009091742A1; CN101918997B; KR20100126305A; CN101918997A; EP2232477A1

Abstract

A mechanism for supporting the weight of a piano lid is disclosed. One or more pneumatic cylinders and arms are used to assist a user in opening and closing the piano lid. In one embodiment, a guiding cup can be removably attached to the frame of the piano below each pneumatic cylinder. When the piano lid is open, the piston arm of the pneumatic cylinder engages the guiding cup. Because the pneumatic cylinder is not attached to the piano frame, the piano lid can be completely removed without the use of tools. Another embodiment provides a mounting bracket that fits over the rear frame of a piano, allowing the mechanism to be retrofit to any existing piano without any damage thereto.

Description

ARTICLE RESISTANT TO THE TRAILER Cross reference to related requests This application claims the benefits of provisional application no. 61 / 021,263 filed on January 15, 20Q8 Field of the Invention The present invention relates to a mechanism and method for assisting users in lifting and supporting a piano cover. More specifically, it is a mechanism that uses at least one pneumatic cylinder to assist a user in opening and closing the piano lid.

Background of the Invention It is often necessary to open the lid of a piano 'and keep it open. The hinges and brackets have been used to open a piano cover and support its weight for some time. There are several difficulties in opening an Ide piano lid, keeping it open, and with time to close it. The piano cover is very heavy and can be difficult to raise. Once the lid is lifted, it may be difficult to place the end of the clamp on the receiving mechanism. Many clamps can be ejected out of place, causing the lid to fall. When the heavy lid is closed, it can easily overcome the user's force and fall too quickly, which could damage the user or the piano.

In the previous example of the related art and the limitations related thereto are by way of illustration and not exclusive. Other limitations of the related technique will become evident for those with knowledge in the field when reading the description and doing a study of the drawings.

Brief Description of the Invention One aspect of the invention is to assist the user in opening a piano lid.

Another aspect of the invention is to dampen the movement of closing a piano cover.

The following aspects and modalities of it are described and illustrated in relation to the systems, tools and methods that are intended to be exemplary and illustrative, and not to limit their scope. In various modalities, one or more of the problems described above have been reduced or eliminated, while other modalities are directed to other improvements.

One embodiment describes a pneumatic cylinder placed in the frame of a piano. An arm is pivotally attached to the lid of the piano. The pneumatic cylinder and the arm are connected. The described modality has an arm and a pneumatic cylinder. More arms and cylinders are possible. The pneumatic cylinder and arm can be adapted to a piano.

Another embodiment describes an internal clamp attached to the structure of the piano. One arm is removably attached to the piano lid. The clamp has two pneumatic cylinders removably attached. The support and cylinders are pivotally attached to the arm. More arms and cylinders are possible. The pneumatic cylinder and arm can be adapted to a piano.

One mode describes two arms removably attached to the lid of a piano. Each arm is attached to a pneumatic cylinder. A guide cup is removably attached to the piano structure under each arm and pneumatic cylinder. When the piano cover is closed, the base of the pneumatic cylinder engages with the guide cup. More pneumatic cylinder arms are possible. Because the pneumatic cylinder is not attached to the piano frame, the piano cover can be removed completely without the use of tools.

Another embodiment describes an arm removably attached to a housing. The housing is removably connected to a mounting bracket. The arm is attached to a pair of pneumatic cylinders. The cups are mounted in a box under each arm and pneumatic cylinder. When the piano cover is closed, the base of the pneumatic cylinder engages with the guide cup. The mounting bracket can be placed on the back frame of the piano without any modification to the piano.

In addition to the exemplary aspects and modalities described above, other aspects and modalities will become apparent in connection with the accompanying drawings forming part of this specification in the given reference characters designating corresponding parts in the various views.

Brief Descron of the Figures Figure 1 is a side perspective view of one embodiment of a mechanism for supporting the weight of a piano top.

Figure 2 is a longitudinal sectional view of a second embodiment of a mechanism for supporting the weight of a piano cover.

Figure 3 is a perspective view of the modalid [ad shown in figure 2.

Figure 4 is a longitudinal sectional view of a third embodiment of a mechanism for supporting the weight of a piano cover.

Figure 5 is a similar view of the embodiment shown, in Figure 4 with the lid partially open.

Figure 6 is a view similar to the embodiment shown in Figure 4 with the lid raised more than 90 ° apart from the piano.

Figure 7 is a longitudinal sectional view of a fourth embodiment of a mechanism for supporting the weight of a piano cover.

Figure 8 is a perspective view of the embodiment shown in Figure 7.

Before explaining the embodiment of the invention in detail, it should be understood that the invention is not limited to | its application to the details of the particular situation that | it is shown, since the invention is capable of other embodiments. Exemplary embodiments are illustrated in the figures in reference to the drawings. It is intended that the modalities and the figures described here should be considered illustrative and not limiting. In addition, the terminology used here is for descrve and non-limiting purposes.

Detailed descron of the invention Referring first to Figure 1, a piano 100 includes a support for the cover 1000 and has an arm 101 attached to | I to the lower portion of the lid 102. The lid 102 is attached to the rear structure 104 of the piano 100 by a hinge 114. The lid 102 is shown in the open position. The arm 101 is approximately 1 m long, approximately 2.5 cm wide and approximately 2.5 cm high. Alternatively, the arm 101 may end at point P, which represents the center of gravity of the lid 102. In the embodiment shown, the arm 101 is 16 gauge tempered steel. While it is depicted of 16 gauge mild steel, it could be use all similar strength and rigidity material, including, but not limited to metals, plastics and ceramics. Two wheels 116a, 116B roll on the inside of a second end of the arm 101. In the embodiment shown, the 116th wheels, 116B have approximately 15 mm in diameter and are nylon. Yes. { the nylon wheels are shown, wheels made of any force material and similar stiffness could be used. The wheels 116a, 116B protrude from the second end of the arm 101 by about 1-2 mm and the contact cap 102. The brizo 101 is substantially parallel to the lower portion of the tsipa 102 when the lid 102 is in a closed position. As the cover 102 rotates from a closed position to an open position, the second end of the arm 101 passes through the lower portion of the piano cover 102 and the angle between the second end of the arm 101 and the piano cover 102 will rise to a range of approximately 30-40 degrees.

A first end of the arm 101 is attached at the pivot point 115 to the mounting bracket 112. The mounting bracket 112 has a leg 113 that extends downward through a hole 110 in the resonance box 111. In the modalid] ad shown, the mounting bracket 112 is of mild steel angle of 2.54 cm x 2.54 cm. Although a 2.54 cm x 2.54 cm mild steel angle is depicted, any material of similar strength and stiffness could be used, including, but not limited to metals, plastics and ceramics. The hole 110 has a diameter of approximately 5 cm. The mounting bracket 112 is attached to the internal upper part 103 of the rear frame 104. The upper part of the mounting bracket 112 is substantially coplanar with the hinge 114. The articulation of the hinge 114 is on the opposite side of the rear frame 104. of the support | of assembly 112.

An adjustable central connector 105 is connected to the removable arm 101 at a distance determined by the equation W = (X'F) / L, where W = the weight to be lifted, X = the distance from the center of the pivot point 119 to the center of the pivot point 115, L = the distance between wheels 116a, 116B to the pivot point 115 and F = the force required in the pneumatic cylinder 107 to lift the weight of the cover 102. A pin 120 is slidable within the slot 117 for adjusting the central connector 105. The piston arm 106 of a removable pneumatic cylinder 107 is connected to the adjustable central connector 105 at the pivot point 119. The lower portion 108 of the pneumatic cylinder 107 is pivotally attached to the leg 113 of the support assembly 112. The pixel 113 is connected to the lower interior part 109 of the rear frame 104 of the piano 100.

In the described embodiment, the pneumatic cylinder 107 can be of a range of sizes exerting approximately between 50 Newtons of force to approximately 1,300 Newtons of force. In the embodiment shown, the pneumatic cylinder 107 has an extended length of 19 cm, a diameter of 2.5 cm, a piston rod of 0.95 cm, a movement of 5 cm and exerts 1,000 Newtons of force. The represented cylinder can be found ?? www.easyliftsprinqs.com As shown in figures 2 and 3, a second embodiment, the lid holder 2000, a mechanism, is shown to support the weight of the piano lid. The lid 202 is joined to the back structure 204 of the piano 100 by a hinge 214. The lid 202 is shown in the open position. An arm 201 rolls on the lower portion of the lid 202. A first end of the arm 201 is attached to the upper rear part 212 of a support 213 at the pivot point 215. The support 213 is attached to the inner top 203 of the rear frame 204 of the piano 10Q and the soundboard 211. The upper part of the support 213 is substantially coplanar with the hinge 214. The hinge hinge 214 is on the opposite side of the rear frame 204 of the support 213. In the embodiment shown, the support 213 is made of square tube of 2.54 cm x 2.54 cm steel of the 16 gauge. Although it is shown, a square tube of 2.54 cm x 2.54 cm of 16 gauge mild steel, could be used any resistance material and similar stiffness, including, but not limited to metals, plastics and ceramics The arm 201 is approximately 1 m long, approximately 2.5 cm wide and approximately 2.5 cm high. Alternatively, the arm 201 may end at the center of gravity of the cap 202. In the embodiment shown, the arm 101 is made of 16 gauge hardened steel. While 16 gauge mild steel is represented, any material of similar strength and stiffness could be used, including, but not limited to metals, plastics and ceramics. The wheel 216 is attached to the inner part of a second end of the arm 201. The second identical wheel is mounted directly behind the wheel 216 as shown in Figure 2. In the embodiment shown, the wheel 216 has a diameter of approximately 15. mm and is nylon. While nyl: on wheels are represented, wheels made of any material with similar strength and rigidity could be used. The wheel 216 protrudes from the second end of the arm 201 by approximately 1-2 mm and makes contact with | the cap 202. The arm 201 is substantially parallel to the lower portion of the cap 202 when the cap 202 is in a closed position. As the lid 202 is rotated from the closed position to an open position, the second end of the arm 201 traverses the lower portion of the piano lid 202 and the angle between the first closed position of the piano lid 202 and the The open position of the piano lid 202 increases to a range of about 30-40 degrees.

The adjustable central connector 205 is removably attached on opposite sides of the arm 201 at a distance determined by the equation W = (X'F) / L, where W = the weight to be lifted, X = the distance from the center of the pivot point 219 to the center of the pivot point 215, L = the distance of the wheel 216 to the pivot point 215, F = the force required in cylinders tires 207, 207a to lift the weight of the lid 202. The bolt 220 is slidable within the slot 217 to fit the central connector 205. The piston arms 206 of pneumatic cylinders 207, 207a are removably attached to the central adjustable connector 205 at the pivot point 219. The lower portion 208 of the pneumatic cylinders 207, 207a are removably attached to opposite sides of the area A of the support 213 at the pivot point 224. Optionally, a leg 223 can be connected to the lower portion of the support 213 to provide structural support. The leg 223 extends through a hole 210 in the sounding box 211 and is removably attached to the support 221 with nuts 222a, 222b. In the embodiment shown, the hole 210 has a diameter of approximately 1 27 cm. The support 221 is attached to the lower portion 209 of the rear piano frame 204 with the bolt 224.

In the described embodiment, the pneumatic cylinder 207 may be of a variety of sizes exerting approximately between 50 Newtons of force to approximately 1,300 Newtons of force. In the embodiment shown, the pneumatic cylinder 207 has an extended length of 19 cm, a diameter of 2.5 cm, a piston rod of 0.95 cm, a stroke of 5 cm and exerts 1000 Newtons of force. The cylinder shown can be found at www.easyliftsprings.com.

As shown in Figures 4, 5 and 6, a third embodiment, the lid support 3000, a mechanism for supporting the weight of the piano lid 302, has an arm 3 (1) 1 attached to the lower portion of the lid. the cover 302 of the piano 100. A first end 316 of the arm 301 has a retracted opening 317. He arm 301 is approximately 1 m long, approximately 2. 5 cm wide and approximately 2.5 cm wide. Alternatively, the arm 301 may terminate at the center of gravity of the lid 302. In the embodiment shown, the arm 301 is 16 gauge mild steel. Although 16 gauge mild steel may be used, any material of similar strength and stiffness may be used. , including, but not limited to metals, plastics and ceramics.

The adjustable central connector 305 is removably attached to opposite sides of the arm 301 at a distance determined by the equation W = (X'F) / L, where W = weight to be lifted, X = the distance from the center of the point of pivot 319 to the center of the pin 315, L = the distance from the second end of the arm 301 to the pin 315 and F = the force required for the air cylinder 307 to lift the weight of the cover 302. The pin 320 is slidable within the slot 317 to adjust the center connector 305.

The piston arm 306 of a pneumatic cylinder 307 is attached to the adjustable center connector 305 at the pivot point 319. The upper portion 318 of a support 313 is attached to the upper part of the rear frame 304 of the piano 100. A guide cup 321 joins the area D of the support 313. The area D is about one third of the depth of the total distance of the support 313 from the front of the support 313. The guide cup 325 is conical in shape. The base E of the guide cup 325 is large enough to accept the arm of the piston 322 of the air cylinder 307. When the lid 302 is closed, gravity will pull the arm of the piston 322 towards the guide cup 321. The conical shape of the guide cup 325 will cause the piston arm 322 of the air cylinder 307 to rest on the base E of the g. 325 cup.

In the embodiment shown, the support 313 is made | square tube of 2.54 cm x 2.54 cm of mild steel gauge 16.

While the 2.54 cm x 2! 54 cm square tube of 16 gauge mild steel is depicted, any material of similar strength and stiffness, including, but not limited to metals, plastics and ceramics, could be used. In the embodiment shown, the air cylinder 307 may be of a range sizes that exert approximately between approximately 50 Newtons of force and approximately 1,300 Newtons of force. In the embodiment shown, the pneumatic cylinder 207 has an extended length of 19 cm, a diameter of 2.5 cm, a piston rod of 0.95 cm, a stroke of 5 cm and exerts 1000 Newtons of force. The cylinder shown can be found at www.easyliftsprings.com.

The interaction of the upper portion 318 of the support 313 and the openings 317 of the arm 301 acts as a hinge for fixing the cover 302 of the rear frame 304 of the piano 100. A pin 315 inserts the retracted opening 317 and acts as an articulation of the hinge created. The inner part 333 of the pin 315 is missing a part of its circumference. In the embodiment shown, the pin 315 is approximately 6] 35 cm in length. The missing part of the circumference of the inner part 333 of the pin 315 and the size of the retracted opening 317 are proportional. The retracted opening 317 of the arm 301 extends more than 180 degrees around the circumference of the pin 315. Therefore, the cover 302 must be raised more than 90 degrees (see dotted line of 90 degrees marked "90 °" in the figure 6) in order to remove the lid 302 from the piano 100. Once the lid 302 is raised more than 90 degrees, the missing part of the circumference of the inner part 333 of the pin 315 allows the lid 302 to be completely removed of the piano 100.

Optionally, a leg 323 can be connected to the lower portion of the support 313 to provide structural support. The leg 323 extends through a hole 310 in the sounding box 311 and is removably attached to the support 321 with nuts 322a, 322b. The hole 310 has a diameter of approximately 1.25 cm. The support 321 is attached to the lower portion 309 of the rear frame 304 of the piano 100 with the bolt 324.

The third described embodiment 3000 has an arm assembly on the opposite side of the piano that is a mirror image of the description of Figures 4, 5 and 6.

Figure 4 shows the lid 302 in the open position.

Figure 5 shows the lid 302 raised from the open position.

Figure 6 shows the lid 302 completely removed from the piano.

As shown in Figs. 7 and 8, a fourth embodiment of, the lid holder 4000, a mechanism for supporting the weight of the piano lid 402, has a mounting bracket 413 placed on the rear frame 404 of the piano 100. In the embodiment shown, support 413 is 16 gauge mild steel rolled metal. Although 16 gauge mild steel rolled metal is shown, any material of similar strength and stiffness could be used, including, but not limited to metals, plastics and ceramics. The internal surface of the mounting bracket 413 is covered with felt so as not to scratch the surface of the piano. Although felt is the preferred material, any material that could avoid scratches could be used. The mounting bracket 413 has a recessed portion 414 in the approximate center of its front face 415. The mounting bracket 413 has holes (not shown) on either side of the recessed portion 414. The connector 428a extends generally perpendicular to the front face 415 of mounting bracket 413. Connector 428a includes grooves 429a. A mirror image connector extends from the other side of the mounting bracket 413 and is not shown. The upper part of the mounting bracket 413 is substantially coplanar with the hinge connecting the cover 402 to the rear frame 404 of the piano 100. articulation of the hinge connecting the cover 402 to the bastidlor 1 Rear 404 of the piano 100 is located on the opposite side of the rear frame 1404 of the front face 415 of the mounting bracket 413. In the embodiment described, the mounting bracket 413 is approximately 25 cm long, approximately 3.18 cm high and approximately 3.81-5 cm wide. In the described embodiment, recessed portion 414 of the mounting bracket 413 is approximately 6.35 centimeters long.

A housing 417 is attached to the mounting bracket 413 In the embodiment shown, the housing 417 is made of 16 gauge mild steel laminated metal. Although 16 gauge mild steel laminated steel is shown, any material of similar strength and stiffness could be used, including, but not limited to metals, plastics and ceramics. The housing 417 has a width approximately equal to that of the retracted portion of the flush mounting bracket 413. In the described embodiment, the housing 417 has a length of approximately 10 cm, a height of approximately 13.65 cm and a width of approximately 6.35 cm. The housing 417 has an extension 418a. In the described embodiment, the extension 418a has a width of 1.9 cm. The extension 418a extends behind the front face 415 of the mounting bracket 413 and is attached thereto through the screw 419a. The screw 419a of the described embodiment is a hollow head bolt of 0.8 cm - 18 x 1.09 cm. The extension rear face 418a is covered with felt. Although felt is the preferred material, any material that could avoid scratches could be used. The housing 417 has a mirror image extension on the other side, which is not shown. The screw 430a furthermore attaches the housing 417 to the mounting bracket 413. The screw 430a is slidable within the slot 429a. In using, the interaction of the 430th screw and the slot 429a serves to prevent the connector 428a and the housing 417 from moving when the pin 419a is tightened. The holder 406a also functions to prevent the connector 428a and the housing 417 from moving when the bolt 419a is tightened. The screw 430a, the slot 406a and the support 429a tocs can be used together. Alternatively, a user may choose to use any of the screw 430a, the slot 406a and the support 429a. It should be understood that any method which can prevent the connector 428a and the housing 417 from moving when the screw 419a is tightened can also be used. The base 419 of the housing 417 has guide cups 421a, 421b in the area D. The area D is approximately one third of the distance from the front of the housing 417. The guide cups 421a, 421b are conical in shape.

An arm 401 is attached to the housing 417 through a pin 420. The pin 420 passes through a first end of the arm 401 and is mounted in the housing 417. In the embodiment of the pin 420 described therein it has a diameter of approximately 0.95 cm. A second end of the arm 401 rolls on the lower portion of the lid 402 through wheels 416a. A second identical wheel is mounted directly behind the wheel 416a as shown in Figure 7. The wheel 416a is attached to the inner portion of the second end of the arm 402. The arm 401 is substantially parallel to the lower portion of the cover 402 when the lid 402 is in a closed position. As the lid 402 rotates from a closed position to an open position, the second end of the arm 401 traverses the lower portion of the piano lid 402 and the angle between the first closed position of the piano lid 402 and the open position of the piano cover 402 increases to a range of approximately 30-40 degrees. Arm 401 is approximately 1 m long, approximately 2.5 cm wide and approximately 2.5 cm high. In the embodiment shown, the arm 401 is 16 gauge tempered steel. On the other hand, the arm 401 may end at the center of gravity of the lid 402. In the embodiment shown, the wheel 416a is approximately 15 mm in diameter and it's nylon. Although nylon wheels are represented, wheels made of any material with similar strength and rigidity could be used. The wheel 416a projects from the second end of the arm 401 approximately 1-2 mm and makes contact with the cover 402.

The support 423 is removably attached to the lower side of the arm 401. A pin 424 is attached to the support 423. The pneumatic cylinders 407a, 407B are joined by eyelets 425a, 425b on each side of the pin 424. In the described embodiment of the pin 424 and eyelets 425a, 425b each have a diameter of approximately 0.95 cm. The location of the support of 423 in the arm of 401 is determined by the equation W = (XF) / L, where W = weight to lift, X = the distance from the center of pin 424 to the center of pin 420, L = the distance between wheels 416a, 416b to pin 420 and F = the force required in pneumatic cylinder 407a, 407b to lift the weight of cover 402.

The base E of the guide cups 421a, 421b is large enough to accept the piston arms 422a, 422b of the pneumatic cylinders 407a, 407b. When cover 402 is closed, gravity will pull piston arms 422a, 422b to the guide cups 421a, 421b. The conical shape of the guide cups 421a, 421b will cause the piston arms 422a, 422b of the cylinders, tires 407a, 07b to rest on the base E of the guide cups 421a, 421 b.

The pneumatic cylinder 407 may be of a variety of sizes that exert approximately 50 Newtons of force and approximately 1300 Newtons of force. In a preferred embodiment, the cylinder has an extended length of 19 cm, a diameter of 2.5 cm, a cylindrical rod of 1.95 cm, a stroke of 5 cm and exerts 1000 Newtons of force. The preferred cylinder can be found at www. easylift springs.com.

During use, the mounting bracket 413 is placed on the rear frame 404 of a piano 100 in a pun chosen among the existing joints. The screws 419a, 419b are used to tighten the piano support cover 4000. The piano cover 402 can now be opened and closed easily. In addition, piano lid 402 can now be stopped at any point between open and closed.

Although a number of aspects have been described | and exemplary modalities, those with knowledge in | Matter will recognize certain modifications, permutations, additions and sub-combinations. It is therefore intended that the following appended claims be construed as including all modifications, permutations, additions and sub-combinations being within their true spirit and scope. Each mode of the apparatus described herein has numerous equivalences.

Claims

1. A support for a piano cover comprising: an arm with a first end and a second end; the second end in contact with a lower portion | of a piano cover; the first end is pivotally connected to a mounting bracket; the arm is substantially parallel to the lower portion of a piano lid when the lid is in a closed position; as the lid rotates from a closed position to an open position, the second end of the arm passes through the lower portion of the piano lid; the mounting bracket joins the back structure of a piano, and a pneumatic cylinder pivotally attached to the arm that holds some of the weight of the piano lid as the piano lid moves.

2. The apparatus of claim 1, wherein the mounting bracket further comprises a leg extending under the support d, the support is attached to the rear frame below the soundboard.

3. The apparatus according to one of claims 1 or 2, with multiple pneumatic cylinders.

4. The apparatus according to one of claims 1 to 3 wherein the upper part of the mounting bracket is substantially coplanar with the hinge connecting the piano cover to the rear frame.

5. The apparatus according to one of claims 1 to 4 wherein] the set of the hinge connecting the piano lid to | the rear structure is on the opposite side of the rear frame of the mounting bracket.

6. The apparatus according to one of claims 1 to 5 wherein the angle between the second end of the arm and the lid increases approximately 35 degrees as the lid rotates from a closed position to an open position.

7. The apparatus according to one of claims 1 to 5 wherein the angle between the second end of the arm and the lid increases approximately 30 degrees as the lid rotates from a closed position to an open position.

8. A support for a piano cover composed of: arm means for supporting a piano cover; the arm means have a first end and a second end; the arm means are substantially parallel to the piano lid when the lid is in a closed position, as the lid rotates from a closed position to an open position the second end of the arm means traverses the lower portion of the piano lid; connecting means the first end of the arm means to the piano, connecting means are attached to the piano frame; a portion of the connecting means are substantially coplanar with the hinge connecting the piano cover to the rear of the frame of a piano the articulation of the hinge is on the opposite side of the rear frame of the connecting means; means for assisting a user in opening a piano cover and dampening the closing movement of the piano cover; the means for assisting a user in opening a piano lid and dampening the closing movement of the piano cover are composed of a pneumatic cylinder, and means for connecting the arm to the means for assisting a user in opening a piano cover and damping the closing movement of said piano cover.

9. The apparatus of claim 6, which comprises means for connecting a mounting bracket.

10. The apparatus according to one of claims 8 or 9, wherein the means for assisting a user in opening a piano cover and dampening the closing movement of the piano cover comprises multiple pneumatic cylinders

11. The apparatus according to one of claims 8 to 10 in which the angle between the second end of the arm and the lid increases approximately 35 degrees as the cover ro from a closed position to an open position.

12. The apparatus according to one of claims 8 to 10 | wherein the angle between the second end of the arm and the lid increases approximately 30 degrees as the lid rotates from a closed position to an open position.

13. A support to a piano cover comprising: an arm attached to the lower portion of a piano cover; the arm has a first end and a second end; the first end has a retracted opening; a pneumatic cylinder is pivotally attached to the arm; a mounting bracket attached to the rear frame of a piano; the interaction of the retracted aperture and the top part of the assembly support read create a hinge; a size pin for adapting the retracted opening of said arm; the pin has a portion of the circumference of its interior surface removed; the pin forms the articulation of the hinge; the retracted opening extends more than 180 degrees around the pin, where when rotating the piano cover more than approximately 90 degrees will allow, remove the lid of the piano.

14. The apparatus of claim 13, wherein the mounting bracket includes a guide cup.

15. The apparatus according to one of claims 13 or 14, | wherein the mounting bracket further comprises a leg that extends below the support, the support is attached to the rear frame below the soundboard.

16. An apparatus for use with a piano, the piano has an upper interior portion of a piano frame, the apparatus has: a mounting bracket; a mounting bracket having a first chelate portion extends parallel to the upper interior portion of a piano frame; a mounting bracket having a second portion extending downward from the parallel portion on the outside of the piano frame; a mounting bracket having a third portion that extends downwardly from the parallel portion inside the piano frame; in which the mounting bracket fits over the upper interior portion of the piano frame; the second end is in contact with a lower side of the lid of that piano; the first end is pivotally attached to the mounting bracket; the arm is substantially parallel to the underside of the piano lid when the lid is in a closed position; when the lid is rotated from a closed position to an open position, the second end of the arm passes through the underside of the lid of the piano; Y a pneumatic cylinder pivotally attached to the arm.

17. A method to hold a lid of a piano consisting of the stages of: lowering a mounting bracket on the upper interior portion of a piano frame; the mounting bracket has a first portion extending parallel to the upper interior portion of a piano frame; a mounting bracket having a second portion that extends downward from the parallel portion on the outside > of the piano frame; a mounting bracket having a third portion that extends downwardly from the parallel portion inside the piano frame; wherein the first portion is located above the upper interior portion of the piano frame; wherein the second portion is on the outside of the upper interior portion of the piano frame; the method further consists in pivotally joining an end primler of an arm to the first portion of the mounting bracket; the method further consists in pivotally joining a pneumatic cylinder to the arm; Y The method also consists of placing the second end of the arm in contact with the lid of the piano.

18. The method of claim 17 further includes opening the lid at least 30 degrees.

19. The method of claim 18 in which the lid remains open at least 30 degrees when a user holds his hand.

20. The method of claim 17 in which a conventional one exerts only half a Newton of force to open the lid.